Piotroski F-Score of 3 is low, which usually implies poor business operation.
The zones of discrimination were as such:
Good or high score = 7, 8, 9
Bad or low score = 0, 1, 2, 3
Prostalund AB has an F-score of 3. It is a bad or low score, which usually implies poor business operation.
The historical rank and industry rank for Prostalund AB's Piotroski F-Score or its related term are showing as below:
OSTO:PLUN'
s Piotroski F-Score Range Over the Past 10 Years
Min: 1 Med: 3 Max: 5
Current: 3
During the past 13 years, the highest Piotroski F-Score of Prostalund AB was 5. The lowest was 1. And the median was 3.
Prostalund AB (OSTO:PLUN) Piotroski F-Score Explanation
The developer of the system is Joseph D. Piotroski is relatively unknown accounting professor who shuns publicity and rarely gives interviews.
He graduated from the University of Illinois with a B.S. in accounting in 1989, received an M.B.A. from Indiana University in 1994. Five years later, in 1999, after earning a Ph.D. in accounting from the University of Michigan, he became an associate professor of accounting at the University of Chicago.
He wanted to see if he can develop a system (using a simple nine-point scoring system) that can increase the returns of a strategy of investing in low price to book (referred to in the paper as high book to market) value companies.
What he found was something that exceeded his most optimistic expectations.
Buying only those companies that scored highest (8 or 9) on his nine-point scale, or F-Score as he called it, over the 20 year period from 1976 to 1996 led to an average out-performance over the market of 13.4%.
Even more impressive were the results of a strategy of investing in the highest F-Score companies (8 or 9) and shorting companies with the lowest F-Score (0 or 1).
Over the same period from 1976 to 1996 (20 years) this strategy led to an average yearly return of 23%, substantially outperforming the average S&P 500 index return of 15.83% over the same period.
Prostalund AB Piotroski F-Score Related Terms
Prostalund AB Piotroski F-Score Historical Data
* Premium members only.
The historical data trend for Prostalund AB's Piotroski F-Score can be seen below:
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
OSTO:PLUN vs HCA, THC, UHS: Piotroski F-Score Comparison
For the Medical Care Facilities subindustry, Prostalund AB's Piotroski F-Score, along with its competitors' market caps and Piotroski F-Score data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Prostalund AB Piotroski F-Score vs Healthcare Providers & Services Industry
For the Healthcare Providers & Services industry and Healthcare sector, Prostalund AB's Piotroski F-Score distribution charts can be found below:
* The bar in red indicates where Prostalund AB's Piotroski F-Score falls into.
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
*Note: If the latest quarterly/semi-annual/annual total assets data is 0, then we will use previous quarterly/semi-annual/annual data for all the items in the balance sheet.
Profitability
Question 1. Return on Assets (ROA)
Net income before extraordinary items for the year divided by Total Assets at the beginning of the year.
Score 1 if positive, 0 if negative.
Prostalund AB's current Net Income (TTM) was -20.38.
==> Negative ==> Score 0.
Question 2. Cash Flow Return on Assets (CFROA)
Net cash flow from operating activities (operating cash flow) divided by Total Assets at the beginning of the year.
Prostalund AB's return on assets of this year was -0.31505642. Prostalund AB's return on assets of last year was -0.28898655.
==> Last year is higher ==> Score 0.
Question 4. Quality of Earnings (Accrual)
Compare Cash flow return on assets (2) to return on assets (1)
Prostalund AB's gearing of this year was 0.00911127. Prostalund AB's gearing of last year was 0.0101455.
==> This year is lower or equal to last year. ==> Score 1.
Question 6. Change in Working Capital (Liquidity)
Compare this year's current ratio (current assets divided by current liabilities) to last year's current ratio.
Score 1 if this year's current ratio is higher, 0 if it's lower
Prostalund AB's current ratio of this year was 2.06594324. Prostalund AB's current ratio of last year was 4.96862299.
==> Last year's current ratio is higher ==> Score 0.
Question 7. Change in Shares in Issue
Compare the number of shares in issue this year, to the number in issue last year.
Score 0 if there is larger number of shares in issue this year, 1 otherwise.
Prostalund AB's number of shares in issue this year was 31.124. Prostalund AB's number of shares in issue last year was 123.038.
==> There is smaller number of shares in issue this year, or the same. ==> Score 1.
Efficiency
Question 8. Change in Gross Margin
Compare this year's gross margin (Gross Profit divided by sales) to last year's.
Score 1 if this year's gross margin is higher, 0 if it's lower.
Prostalund AB's gross margin of this year was 0.68117266. Prostalund AB's gross margin of last year was 0.70527941.
==> Last year's gross margin is higher ==> Score 0.
Question 9. Change in asset turnover
Compare this year's asset turnover (total sales for the year divided by total assets at the beginning of the year) to last year's asset turnover ratio.
Score 1 if this year's asset turnover ratio is higher, 0 if it's lower
Prostalund AB's asset turnover of this year was 0.18613387. Prostalund AB's asset turnover of last year was 0.23568019.
==> Last year's asset turnover is higher ==> Score 0.
Evaluation
Piotroski F-Score
=
Que. 1
+
Que. 2
+
Que. 3
+
Que. 4
+
Que. 5
+
Que. 6
+
Que. 7
+
Que. 8
+
Que. 9
=
0
+
0
+
0
+
1
+
1
+
0
+
1
+
0
+
0
=
3
Good or high score = 7, 8, 9
Bad or low score = 0, 1, 2, 3
Prostalund AB has an F-score of 3. It is a bad or low score, which usually implies poor business operation.
Prostalund AB (OSTO:PLUN) has a Piotroski F-Score of 3 as of Jul. 04, 2026. The Piotroski F-score grades a company's business operating strength from 0-9. View historical data on Prostalund AB and its competitors. This is near median its historical median of 3.00. Over the past decade, Prostalund AB's Piotroski F-Score has ranged from 1.00 to 5.00.
Is Prostalund AB's Piotroski F-Score too high?
Prostalund AB's current Piotroski F-Score of 3 is near median its 10-year median of 3.00. Over the past 10 years, this metric has ranged from a low of 1.00 to a high of 5.00. The Healthcare Providers & Services industry median Piotroski F-Score is 5.00. Prostalund AB's value of 3 is 40% below this industry median. Overall, Prostalund AB has a GF Score™ of 42/100, reflecting its overall financial health beyond just this single metric.
How does Prostalund AB's Piotroski F-Score compare to HCA and THC?
Prostalund AB's Piotroski F-Score of 3 can be compared against companies in the Healthcare Providers & Services industry. The industry median Piotroski F-Score is 5.00. Prostalund AB's value of 3 is 40% below this benchmark. Historically, Prostalund AB's own Piotroski F-Score has ranged from 1.00 to 5.00 over the past decade. While the company's 10-year median is 3.00 vs. the industry median of 5.00, Prostalund AB has consistently been below the industry average. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Piotroski F-Score for a Healthcare Providers & Services company?
The median Piotroski F-Score among Healthcare Providers & Services companies is 5.00, based on 651 companies in the industry. Companies in the top quartile (top 25%) have a Piotroski F-Score significantly above this median, while those in the bottom quartile fall well below. However, Piotroski F-Score should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Prostalund AB's current Piotroski F-Score of 3 is 40% below the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Piotroski F-Score mean?
A high Piotroski F-Score can signal that a stock is expensive relative to its fundamentals. The Piotroski F-score grades a company's business operating strength from 0-9. View historical data on Prostalund AB and its competitors. For the Healthcare Providers & Services industry, the median Piotroski F-Score is 5.00 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Prostalund AB's current Piotroski F-Score is 3, which is near median its own 10-year median of 3.00. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Prostalund AB stock overvalued right now?
Prostalund AB (OSTO:PLUN) has a current Piotroski F-Score of 3. The stock's GF Value™ is kr8.60, compared to a current price of kr0.21 — trading 97.5% below its estimated fair value. The current Piotroski F-Score is 3, which is near median its 10-year median of 3.00 and 40% below the Healthcare Providers & Services industry median of 5.00. Prostalund AB's overall GF Score™ is 42/100 with 6 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Piotroski F-Score calculated?
Piotroski F-Score is calculated from a company's financial statements. For Prostalund AB (OSTO:PLUN), the current Piotroski F-Score is 3 as of Jul. 04, 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is Prostalund AB (OSTO:PLUN) Overvalued in 2026?
Based on GuruFocus' analysis, Prostalund AB stock appears to be undervalued.
The current stock price of kr0.21 is trading 97.5% below its estimated GF Value™ of kr8.60.
Key valuation signals for OSTO:PLUN:
Piotroski F-Score: 3 (near median its 10-year median of 3.00)
GF Value™: kr8.60 vs. price of kr0.21 (97.5% below fair value)
Industry Position: 40% below the Healthcare Providers & Services median
No single metric tells the full story. See the OSTO:PLUN stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Prostalund AB develops, markets and sells urological products. The Company has a treatment concept (CoreTherm Concept) for personalized heat treatment for the condition benign prostatic hyperplasia, also known as BPH or BPE, which mainly affects men over the age of 50. It has developed a new platform, CoreTherm Eagle which includes an inbuilt computer, real-time temperature reading, patient data storage and inbuilt recommendations for treating physicians.
42GF Score
Get the complete analysis for OSTO:PLUN
Piotroski F-Score is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
OSTO:PLUN has been successfully added to your 
